Replies

1. 
   Eidemiller | Oct 03, 2002 08:47pm | #1

     As I understand it, the whole purpose of the sleeve is just to isolate the pipe and the concrete, so the foundation won't bear on the pipe as it settles.  I'd think that leaving the sleeve would be easiest, but don't think it really matters.

     I'll wait for the plumbers out there to clarify
1. 
   JohnCA07 | Oct 03, 2002 08:56pm | #2

   Thanks for your input.  Pretty quiet around here today.

2. 
   eborg2 | Oct 03, 2002 09:11pm | #3

   John,

   Sleeve material can be anything that is rigid enough to hold up during your concrete pour.  I like to use PVC since it's rigid and easy to work with.  It is your choice whether to leave it in or chip it out but but that's just extra work.  The purpose of a sleeve is so you don't have to core drill through hardened concrete for your pipe entrance.  If your using modular forms and don't want to destroy them by running the sleeve all the way through, then just cut it so it will be a tight fit between the forms and anchor it by driving several nails through the form tight to the inside perimeter of the sleeve.  This will hold it in place.  Take it easy on the concrete vibrator around this area.  Also don't free fall the concrete down on top of it.  Just got to use common sense.  You didn't say if this penetration is above or below grade.  This will make a difference in what you use to seal around it.

   Good luck with your pour.

   Eric

1. 
   JohnCA07 | Oct 03, 2002 09:50pm | #4

   EBORG2

   This will be below grade. The required slope puts the pipe penetration right at the top of my footing.   As you sound up to speed on this topic, let me ask, if you were running  4" pipe through a stemwall what would your sleeve size be? If you say anything larger than 4" then what do you use to fill the gap between the sleeve and the final 4" DWV pipe

   Just out of curiosity, does anyone know why its code to sleeve rather than just install the final pipe? I just hate to follow a code blindly.

   Thanks for the help.-John

1. 
   JohnSprung | Oct 04, 2002 01:02am | #5

   > Just out of curiosity, does anyone know why its code to sleeve rather than just install the final pipe?

   It's to allow for differential settling - the concrete and pipe can move relative to each other rather than bending or breaking the pipe.  It also makes it a lot easier to replace the pipe in the future if that becomes necessary.

   -- J.S.

3. 
   JohnCA07 | Oct 04, 2002 08:57pm | #6

   For anyone else who needs the details on penetrating a foundation with a drainage pipe here is the quick and dirty answer I found. 

   A soil pipe, waste pipe, or building drain that passes under a footing or through a foundation wall shall be provided with a relieving arch, or a pipe sleeve of schedule 40 pipe shall be built into the masonry wall. Such sleeve shall be two pipe sizes greater than the pipe passing through or as may be approved in writing by the plumbing official.

   INTERPRETATION: Building drains passing through or under footings or building foundations must be protected with a pipe sleeve extending a minimum of 1" beyond the brick (foundation) or concrete (footing). The pipe must be 2 pipe sizes greater than the building drain (3" building drain = 4" sleeve, 4" building drain = 5" sleeve). The annular space must filled or caulked with water resistant material.